C++编程基础二 23-对象数组

#pragma once
#ifndef ARRAY_H_
#define ARRAY_H_

class Calculator
{
private:
    float number1_;
    float number2_;
    
public:
    Calculator(float num1,float num2); //有参数的构造函数
    Calculator(); //无参数的构造函数
    ~Calculator(); //析构函数
    void reinputNumber(float num1,float num2);
    float sum();         //加
    float subtract();    //减
    float multiply();    //乘
    float division();    //除
};

#endif // !ARRAY_H_

#include "stdafx.h"  //系统默认的头文件
#include "array.h" //自定义的头文件

Calculator::Calculator(float num1, float num2)
{
    number1_ = num1;
    number2_ = num2;
}

Calculator::Calculator()
{
}

Calculator::~Calculator()
{
}

void Calculator::reinputNumber(float num1, float num2)
{
    number1_ = num1;
    number2_ = num2;
}

float Calculator::sum()
{
    
    return number1_ + number2_;
}

float Calculator::subtract()
{
    return number1_ - number2_;
}

float Calculator::multiply()
{
    return number1_ * number2_;
}

float Calculator::division()
{
    return number1_ / number2_;
}

// C++函数和类 23-对象数组.cpp: 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include "array.h"
#include <iostream>
using namespace std;


int main()
{ 
     
    int num1, num2;
    int selectNumber;
    cout << "请选择以下计算方式：(输入数字编号)" << endl;
    cout << "1.相加   " << "2.相减   " << "3.相乘   " << "4.相除   ";
    cin >> selectNumber;
    cout << "请输入第一个数字：";
    cin >> num1;
    cout << "请输入第二个数字：";
    cin >> num2;
    Calculator cal[2] = {};   //对象数组声明
    cal[0] = Calculator(num1,num2);  //对象数组初始化
    cal[1] = Calculator(num1, num2);

    if (selectNumber == 1)
    {
        cout<<"相加结果为: "<<cal[0].sum();
    }
    else if (selectNumber == 2)
    {
        cout << "相减结果为: " << cal[0].subtract();
    }
    else if (selectNumber == 3)
    {
        cout << "相乘结果为: " << cal[0].multiply();
    }
    else if (selectNumber == 4)
    {
        cout << "相除结果为: " << cal[0].division();
    }
    else
    {
        cout << "请输入正确数字编号！";
    }

    return 0;
}